Combination measuring instrument.



NO MODEL.

PATENTED SEPT. 18.1904.

W. B. TERRY.

COMBINATION MEASURING INSTRUMENT.

APPLICATION FILED DEO. 3, 1903.

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Attorney .Patented September 13, 1904.

IINTTED STATES PATENT EETQE.

WILLIAM BLAKE TERRY, OE ASPERMONT, TEXAS.

COMBINATION NIEASURING INSTRUMENT.I

SPECIFICATION forming part of Letters Patent No. 769,849, datedSeptember 13, 1904.

Application filed December 3, 1903. Serial No. 183,651. (No model.)

T0 all, whom, t may concern,.-

Beit known that I, WTLLIAM BLAKE TERRY, a citizen of the United States,residing at Aspermont, in the county of Stonewall and State of Texas,have invented certain new and useful Improvements in CombinationMeasuring Instruments; and I do declare the following to beafull, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to improvements in measuring instruments.

The object of the invention is to provide an instrument having a widerange of usefulness in measuring', leveling, and surveying operationsand so constructed as to be of advantage to mechanics and workmen ofdifferent callings.

In the accompanying drawings, Figure 1 is a side View of one side of thecombination instrument, showing in dotted lines the extended positionsof the parts. Fig. 2 is a similar View of the opposite side. Eig. 3 isan edge View. Fig. l is a detail sectional view on the line 4 A ofEig. 1. Fig. 5 is a similar view on the line 5 5 of Fig. 1. Fig. 6 isadetail fragmentary sectional view on the line 6 6 of Eig. 1.

Referring to the drawings more particularly, 1 denotes a square, thearms or blades 2 and 3 of which are of equal length and are each,preferably though not necessarily, two feet in length and of suitableWidth and thickness. The arms or blades of the square are formed with aninner core 4L, of Wood, which is inclosed in a metallic casing 5,constructed in two sections to permit the same to be applied to thewooden core, said sections being held in place by screws or otherfastening devices 6. Between the adjacent ends of the outer side edgesof the casing a space is left to form a groove or channel 7, the purposeof which will be hereinafter described. Connecting the ends of the armsis a curved blade or segment 8, which is so constructed as to beextended beyond the arms or blades 2 and 3, as shown in dotted lines' inFig. 1. The segmental blade 8 consists of a central body portion 9,which is substantially H-shaped in cross-section and provided withprojecting side flanges 10, which are adapted to be engaged by casings12 and 13, said casings being arranged on the flanged sides l0 to slidein opposite directions. Set-screws 14 are provided near the ends of thecasings l2 to engage the body portion 9 and hold said casings extendedto any desired position. The body portion 9 of the segmental blade maybe secured to the ends of the arms or blades 2 and 3 in any suitablemanner, but are here shown as provided with a screw-bolt 15, which ispassed through the ends of the body portion 9 radially and throughopenings in the ends of the arms or blades 2 and 3, where they areadapted to engage nuts 16, which are countersunk or inserted in openingstherefor' in the sides of said arms or blades.

To one end of the sliding casing 12 is connected the outerend of an armor brace-bar 17, and to the opposite end of the casing 13 is connectedthe outer end of an arm or bracebar 18. The inner ends of the arms orbracebars 17 and 18 are pivotally connected and mounted in the corner ofthe connected ends of the square. The brace-bars 17 and 18 are of suchwidth that they are adapted when folded to lie within the grooves orchannels 7 between the edges of the casings 5.

In one side of the body or core 4 are formed a number of recesses, inwhich are arranged instruments of different varieties, and in the casing5 over said recesses are formed viewopeiings, whereby the instrumentsmay be rea Near the upper end of the blade 2 is formed a recess, inwhich is arranged a transverselydisposed spirit-level glass 20.Immediately below the spirit-level 2O is arranged an opening through theblade, and in said opening is arranged an altitude-gage 21. Below thealtitude-gage is arranged in the side of the blade a thermometer 22, ona line with which, but in the inner edge of the blade, is arranged avertically-disposed spirit-level glass 23. the thermometer 22 and level23 is arranged a 1barometer 24.

Beloyv perpendicular position Will register at 0, but when the blade orsquare is leaned in one direction or the other the degrees of suchinclination will be indicated by the pendulum on the dial.

Near the outer end of the arm or blade 3 and in the side of the same isarranged a vertically-disposed spirit-level glass 27, whilesubstantially midway between the ends of the blade and in the edge ofthe same is arranged a horizontally-disposed spirit-level glass 28. Nearthe inner end of the blade 3 and on the side of the same is arranged asocket 29 for the reception of a J acobs staff.

On the edge of the blade 3 and at the inner end or corner of the same ismounted a sur- Veyors rear sight-piece 30, .which is adapted to have asliding engagement in a socket 31, formed on the blade, whereby the samemay be pushed in when not in use. A front sightpiece 32 is arranged nearthe outer end of the arm 3 to coact with the sight 30 and form aleveling or surveying instrument. The sightpiece 32 is formed in theshape of a springplate, one end of which is iixed to the edge of theblade by a screw or other suitable means, this sight being normally helddown against the blade by a slide 33.

When the instrument is to be used for surveying or leveling purposes,the same is inverted to bring the outer edge of the blade 3 up in ahorizontal position. A Jacobs staff is then inserted in the socket 29 tosupport the instrument and the sight-pieces elevated for use. On theouter edge or' the blade 3 is removably secured a mariners compass 34and oppositely-arranged spirit-levels 35 and 36, all of which are usedin connection with the sights 30 and 32 to facilitate the leveling andsurveying operations when the instrument is used for this purpose.

It will be understood that the compass 34 and levels 35 and 36 will beremoved when the segmental casing is to be extended to permitthe arm orbar 18 to swing outwardly.

The slidable members 12 13 of the blade or segment 8 enable the arms orbars 17 18 to be disposed at any desired angle to enable the instrumentto be used when placing timbers at any inclination or at angles otherthan right angles.

On the sides of the casings of the blades 2 and 3 opposite to thatcontaining the recesses is arranged the ordinary division-marksindicating inches and fractions oi' inches. On the sliding casings 12and 13 are formed two sets of division-marks, indicating both inches anddegrees, as shown.

The many uses in which this instrument may be employed and theadvantages to be had by arranging in combination the various usefulinstruments herein described will be readily apparent from the foregoingdescription taken in connection with the accompanying drawings.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacriiicing any of the advantages of this invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. An instrument oi' the class described, comprising a square, and asegmental blade connecting the outer ends of the arms of the square andhaving slidable members adapted to be extended beyond the said arms.

2. An instrument of the class described, comprising a square, asegmental core-piece connecting the outer ends of the arms thereof, andsegmental casings slidably secured on the said core-piece and therebyadapted to be extended in opposite directions beyond the said arms.

3. An instrument of the character described, consisting of a square,measuring instruments arranged on and carried by the blades oi' saidsquare, a segmental blade consisting of a central body portion,removably secured to and connecting said square-blades, andoppositely-sliding side pieces mounted on said central portion, havingmeans for slidingly holding said side pieces to said central piece andmeans for holding the same in adjusted positions, substantially asdescribed.

4;. An instrument of the character described, consisting of a square,measuring instruments arranged on and carried by the blades of saidsquare, a segmental blade consisting of a central iianged body portionremovably secured to and connecting said IOO square-blades, and sidepieces slidably engaging said hanged central portion to move in oppositedirections, brace-bars pivotally connected at one end to said slidingside pieces and at their opposite ends to said square, and set-screwsarranged to hold said sliding side pieces in their adjusted positions,substantially as described.

5. An instrument of the character described, consisting of a square, thearms or blades of which are formed of an inner core or body portion, andan outer shell or casing, recesses formed in said inner core or body.portion to contain measuring instruments,

view-openings formed in said casings over Said recesses, a segmentalblade consisting of a central flanged body portion, removably secured toand connecting said square-blades, and side pieces slidably engagingsaid flanged central portion to move in opposite directions, brace-barspivotally connected at one end to said sliding side pieces and at theiropposite ends to said square, and set-screws arranged to hold saidsliding side pieces in their adjusted positions, substantially asdescribed.

6. An instrument of the class described, comprising a square, asegmental blade con- IOS IIO

nesting the ends of the arms of the square In testimony whereof I havehereunto set and having sldable members adapted to be my hand inpresence of tWo subsoribimqV Witextended beyond the arms of the square,and nesses.

arms attached to theends of the said slidable WILLIAM BLAKE TERRY. 5members and pivotally connected to the Witnesses:

square at the point Where the arms thereof B. S. TILLoTsoN,

meet. I. M. V. BULLooK.

